mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-24 14:26:09 +03:00
106 lines
3.3 KiB
C++
106 lines
3.3 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "crypto/symmetric_key.h"
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include <algorithm>
|
|
#include <utility>
|
|
|
|
#include "base/logging.h"
|
|
#include "base/strings/string_util.h"
|
|
#include "crypto/openssl_util.h"
|
|
#include "third_party/boringssl/src/include/openssl/evp.h"
|
|
#include "third_party/boringssl/src/include/openssl/rand.h"
|
|
|
|
namespace crypto {
|
|
|
|
SymmetricKey::~SymmetricKey() {
|
|
std::fill(key_.begin(), key_.end(), '\0'); // Zero out the confidential key.
|
|
}
|
|
|
|
// static
|
|
std::unique_ptr<SymmetricKey> SymmetricKey::GenerateRandomKey(
|
|
Algorithm algorithm,
|
|
size_t key_size_in_bits) {
|
|
DCHECK_EQ(AES, algorithm);
|
|
|
|
// Whitelist supported key sizes to avoid accidentaly relying on
|
|
// algorithms available in NSS but not BoringSSL and vice
|
|
// versa. Note that BoringSSL does not support AES-192.
|
|
if (key_size_in_bits != 128 && key_size_in_bits != 256)
|
|
return nullptr;
|
|
|
|
size_t key_size_in_bytes = key_size_in_bits / 8;
|
|
DCHECK_EQ(key_size_in_bits, key_size_in_bytes * 8);
|
|
|
|
if (key_size_in_bytes == 0)
|
|
return nullptr;
|
|
|
|
OpenSSLErrStackTracer err_tracer(FROM_HERE);
|
|
std::unique_ptr<SymmetricKey> key(new SymmetricKey);
|
|
uint8_t* key_data = reinterpret_cast<uint8_t*>(
|
|
base::WriteInto(&key->key_, key_size_in_bytes + 1));
|
|
|
|
int rv = RAND_bytes(key_data, static_cast<int>(key_size_in_bytes));
|
|
return rv == 1 ? std::move(key) : nullptr;
|
|
}
|
|
|
|
// static
|
|
std::unique_ptr<SymmetricKey> SymmetricKey::DeriveKeyFromPassword(
|
|
Algorithm algorithm,
|
|
const std::string& password,
|
|
const std::string& salt,
|
|
size_t iterations,
|
|
size_t key_size_in_bits) {
|
|
DCHECK(algorithm == AES || algorithm == HMAC_SHA1);
|
|
|
|
if (algorithm == AES) {
|
|
// Whitelist supported key sizes to avoid accidentaly relying on
|
|
// algorithms available in NSS but not BoringSSL and vice
|
|
// versa. Note that BoringSSL does not support AES-192.
|
|
if (key_size_in_bits != 128 && key_size_in_bits != 256)
|
|
return nullptr;
|
|
}
|
|
|
|
size_t key_size_in_bytes = key_size_in_bits / 8;
|
|
DCHECK_EQ(key_size_in_bits, key_size_in_bytes * 8);
|
|
|
|
if (key_size_in_bytes == 0)
|
|
return nullptr;
|
|
|
|
OpenSSLErrStackTracer err_tracer(FROM_HERE);
|
|
std::unique_ptr<SymmetricKey> key(new SymmetricKey);
|
|
uint8_t* key_data = reinterpret_cast<uint8_t*>(
|
|
base::WriteInto(&key->key_, key_size_in_bytes + 1));
|
|
int rv = PKCS5_PBKDF2_HMAC_SHA1(
|
|
password.data(), password.length(),
|
|
reinterpret_cast<const uint8_t*>(salt.data()), salt.length(),
|
|
static_cast<unsigned>(iterations),
|
|
key_size_in_bytes, key_data);
|
|
return rv == 1 ? std::move(key) : nullptr;
|
|
}
|
|
|
|
// static
|
|
std::unique_ptr<SymmetricKey> SymmetricKey::Import(Algorithm algorithm,
|
|
const std::string& raw_key) {
|
|
if (algorithm == AES) {
|
|
// Whitelist supported key sizes to avoid accidentaly relying on
|
|
// algorithms available in NSS but not BoringSSL and vice
|
|
// versa. Note that BoringSSL does not support AES-192.
|
|
if (raw_key.size() != 128/8 && raw_key.size() != 256/8)
|
|
return nullptr;
|
|
}
|
|
|
|
std::unique_ptr<SymmetricKey> key(new SymmetricKey);
|
|
key->key_ = raw_key;
|
|
return key;
|
|
}
|
|
|
|
SymmetricKey::SymmetricKey() = default;
|
|
|
|
} // namespace crypto
|